Find special sized air filters online here

Custom air filters for your furnace, air conditioner and heat pump. Made-to-order for exact fit. No more torn or collasped filters. Get the sized needed to filter your indoor air effectively.

The links on this page will take you directly to custom-sized air filters online.
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HVAC Air Filters In Custom Sizes

Go to Air Filters DeliveredAir Filters Delivered linkAir Filters Delivered:Build your filter. Shop custom and hard-to-find air filters. Use our tool to find or customize the right size for your furnace or AC unit.
Go to Air Filters, Inc.Air Filters, Inc. linkAir Filters, Inc.:Air Filters, Inc. has the capabilities of custom manufacturing any and all types of air filters. Specify your requirements using our custom filter creator.
Go to American FiltrationAmerican Filtration linkAmerican Filtration:Complete line of residential air filters including Custom-Made, Special sizes, Pleated, Antibacterial, and Room Air Cleaners.
Go to Discount FiltersDiscount Filters linkDiscount Filters:Create a custom sized air filter to fit any size furnace. Have your filter be made to the exact measurements. Buy yours today!
Go to Factory Direct FiltersFactory Direct Filters linkFactory Direct Filters:Custom and hard to find air filter sizes for your AC or furnace. Order pleated or fiberglass air filters online.
Go to Filter FactoryFilter Factory linkFilter Factory:Custom air filters online - made to any odd size. Our patented air filters fit perfectly, no matter what size air filter you have at
Go to Filter MarketFilter Market linkFilter Market:Shop custom and hard-to-find air filters for your furnace or AC unit. Premium quality by 3M Filtrete and Accumulair.
Go to Filter SolutionFilter Solution linkFilter Solution:Air Conditioner Filters, Home Air Filters, and Furnace Air Filters may be found at
Go to FilterBuyFilterBuy linkFilterBuy:Save time & money with custom air filters for hard-to-find filter sizes. Customer-created custom sizes are available for easy reference. Same-day shipping.
Go to Filters FirstFilters First linkFilters First:Custom Sized Filters | Filters First | A World of Filters
Go to Filters-NowFilters-Now linkFilters-Now:Custom air filters, exact size air filters, furnace filters, air filters for house and air conditioner filters.
Go to Lowe'sLowe's linkLowe's:Shop custom and hard to find furnace filter sizes for your home or business. Provided by
Go to Nebraska Air FilterNebraska Air Filter linkNebraska Air Filter:Buy Custom Air Filters -
Go to Never Buy Another FilterNever Buy Another Filter linkNever Buy Another Filter:Your home should be your "allergy safe zone."Washable Air Care filters provide relief for allergy sufferers! Reduces airborne dust and allergens like pollen, dust mites, mold spores and pet dander.
Go to Nordic PureNordic Pure linkNordic Pure:Custom sized MERV rated, pleated furnace air filters |
Go to Ontime Air FiltersOntime Air Filters linkOntime Air Filters:Order custom size air filters and odd-sized filters you can't find at stores at On Time Air Filters, your home for delivery of custom filters.
Go to Remember The FilterRemember The Filter linkRemember The Filter:Custom furnace filters and air conditioner filters made to your exact size. We have a large selection of custom furnace filters for you to choose from including pleated and fiberglass filters.
Go to The Home DepotThe Home Depot linkThe Home Depot:Custom Size Air Filters & Furnace Filters |
Go to U.S. Home FilterU.S. Home Filter linkU.S. Home Filter:If you cannot find the replacement air filter size that your system requires, we can build your exact size! You don't have to spend hundreds of dollars having your HVAC system re-engineered to accommodate standard sizes. Affordable prices and quick lead times take the frustration out of ordering custom air filters.
Go to VenfilterVenfilter linkVenfilter:Sometimes we find systems that require a of non-standard sized air filtes, so that is the main reason why here at Venfilter we can manufacture custom sized filters for every filtering requirement. | Venfilter Air filters and industrial ventilation
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By Category: Air Filters

Go to Air Conditioning FiltersAir Conditioning Filters linkAir Conditioning Filters
Go to Commercial HVAC FiltersCommercial HVAC Filters linkCommercial HVAC Filters
Go to Electronic Air CleanersElectronic Air Cleaners linkElectronic Air Cleaners
Go to Electrostatic Air FiltersElectrostatic Air Filters linkElectrostatic Air Filters
Go to Furnace FiltersFurnace Filters linkFurnace Filters
Go to Geothermal HVAC FiltersGeothermal HVAC Filters linkGeothermal HVAC Filters
Go to Heat Pump FiltersHeat Pump Filters linkHeat Pump Filters
Go to HEPA Air FiltersHEPA Air Filters linkHEPA Air Filters
Go to ULPA Air FiltersULPA Air Filters linkULPA Air Filters

Special Air Filters: Custom Sized

There are circumstances where an HVAC system can have an air filter that is not a standard size. What we define as "standard size" are filters that are mass-produced at certain dimensions (width and length). For example, a 16" x 20" filter is a common (standard) sized air filter. You can get filters custom sized to fit your indoor unit properly. After placed in its housing, a filter should never have any gaps that dirt or debris can pass by to the indoor unit. This will cause dirty blower motors and wheels, heat exchangers (furnaces), and evaporator refrigerant coils (air conditioning or heat pumps). Some filters are slid into a filter rack attached to the unit or in the return ducting. Some filters come in a return filter grille. These grilles have a door that swings out; exposing the filter for replacement. An air filter should fit in the filter rack or grille housing and be easily removed and replaced. You can test this by removing the filter from its housing without snagging or bending. If you ever had an air filter forced out of its housing and into the indoor unit, it was either too dirty or undersized. Being too dirty will cause a proper sized filter to come out of its holder because the force of the indoor blower will cause a dirty filter to collapse; forcing it into the system. An undersized filter will do the same. All filters are ½" of the exact dimensions of its housing. So a standard 16" x 20" filter is actually 15½" x 19½". This provides a ¼" play to replace and remove easily. So remember, if you are looking for a custom sized air filter take the exact measurement of its housing (width and length) and subtract ½" from each result to ensure a proper fit and filtration.

The links on this page will take you to custom-sized air filters online.

By Category: HVAC Air Filters

Go to Air Conditioning FiltersAir Conditioning Filters linkAir Conditioning Filters
Go to Commercial HVAC FiltersCommercial HVAC Air Filters linkCommercial HVAC Air Filters
Go to Electronic Air FiltrationElectronic Air Filtration linkElectronic Air Cleaners
Go to Electrostatic Air FiltrationElectrostatic Air Filtration linkElectrostatic Air Filters
Go to Furnace Air FiltersFurnace Air Filters linkFurnace Air Filters
Go to Geothermal HVAC Air FiltersGeothermal HVAC Air Filters linkGeothermal HVAC Air Filters
Go to Heat Pump Air FiltersHeat Pump Air Filters linkHeat Pump Air Filters
Go to HEPA HVAC Air FiltersHEPA HVAC Air Filters linkHEPA HVAC Air Filters
Go to ULPA HVAC Air FiltersULPA HVAC Air Filters linkULPA HVAC Air Filters
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An air filter that is not sized properly for its filter rack will allow dirt and other impurities to pass around it.

Keep your indoor air clean as well as your HVAC unit and ducting by getting the right sized filter online.